He turned into the dark passage, the door was closed, and I went on my way.
The little meandering street was singularly silent and deserted; and its windings cut off the light from the scanty street-lamps so that stretches of it were in almost total darkness. As I strode forward, the echoes of my footfalls resounded with hollow reverberations which smote my ear—and ought to have smitten my conscience—causing me to wonder, with grim amusement, what Thorndyke would have said if he could have seen me thus setting his instructions at defiance. Indeed, I was so far sensible of the impropriety of my being in such a place at such an hour that I was about to turn to take a look back along the street; but at the very moment that I halted within a few feet of a street-lamp, something struck the brim of my hat with a sharp, weighty blow like the stroke of a hammer, and I heard a dull thud from the lamp-post.
In an instant I spun round, mighty fierce, whipping out my pistol, cocking it, and pointing it down the street as I raced back towards the spot from whence the missile had appeared to come. There was not a soul in sight nor any sound of movement, and the shallow doorways seemed to offer no possible hiding place. But some thirty yards back I came suddenly on a narrow opening like an empty doorway, but actually the entrance to a covered alley not more than three feet wide and as dark as a pocket. This was evidently the ambush (which I had passed, like a fool, without observing it), and I halted beside it, with my pistol still pointed, listening intently and considering what I had better do. My first impulse had been to charge into the alley, but a moment’s reflection showed the futility of such a proceeding. Probably my assailant had made off by some well-known outlet; but in any case it would be sheer insanity for me to plunge into that pitch-dark passage. For if he were still lurking there he would be invisible to me, whereas I should be a clear silhouette against the dim light of the street. Moreover, I had seen no one, and I could not shoot at any chance stranger whom I might find there. Reluctantly I recognized that there was nothing for it but to retreat cautiously and be more careful in future.
My retirement would have looked an odd proceeding to an observer, if there had been one, for I had to retreat crab-wise in order that I might keep the entrance of the alley covered with my pistol and yet see where I was going. When I reached the lamp-post I scanned the area of lighted ground beneath it, and, almost at the first glance, perceived an object like a largish marble lying in the road. It proved, when I picked it up, to be a leaden ball, like an old-fashioned musket-ball, with one flattened side, which had prevented it from rolling away from the spot where it had fallen. I dropped it into my pocket and resumed my masterly retreat until, at length, the cross-roads came into view. Then I quickened my pace, and as I reached the corner put away my pistol after slipping in the safety catch.
Once more out in the lighted and frequented main streets, my thoughts were free to turn over this extraordinary experience. But I did not allow them to divert me from a very careful look-out. All my scepticism was gone now. I realized that Thorndyke had not been making mere vague guesses, but that he had clearly foreseen that something of this kind would probably happen. That was, to me, the most perplexing feature of this incomprehensible affair.
I turned it over in my mind again and again, and could make nothing of it. I could see no adequate reason why this man should want to make away with me. True, I was Marion’s protector; but that—even if he were aware of it—did not seem an adequate reason. Indeed, I could not see why he was seeking to make away with her—nor, even, was it clear to me that there had been a reasonable motive for murdering her father. But as to myself, I seemed to be out of the picture altogether. The man had nothing to fear from me or to gain by my death.
That was how it appeared to me; and yet I saw plainly that I must be mistaken. There must be something behind all this—something that was unknown to me but was known to Thorndyke. What could it be? I found myself unable to make any sort of guess. In the end, I decided to call on Thorndyke the following evening, report the incident, and see if I could get any enlightenment from him.
The first part of this programme I carried out successfully enough, but the second presented more difficulties.
Thorndyke was not a very communicative man, and a perfectly impossible one to pump. What he chose to tell he told freely; and beyond that, no amount of ingenuity could extract the faintest shadow of a hint.
“I am afraid I am disturbing you, Sir,” I said in some alarm, as I noted a portentous heap of documents on the table.